Field pointing machine



June 30, 1931. H. PARKER l 1,811,894l

` FIELD POINTING MACHINE Filed sept. 21. 192e 's sheets-sheet 1 H. PARKER FIELD POINTING MACHINE n June 30, 1931.

Filed Sept. 2l. v1926 3 Sheets-Sheet 2 June 30, 1931. H. PARKER FIELD POINNNG MACHINE Filed sept. 21', 1926 s sheets-sheet s Patented June 30, 1951V VHOYJAD PARKER, OF BERLEN, :NEW

OF BERLN, l-IEEV Z intesi FEELD PSIIITENG IiIAIINE Application filed Septeir This invention relates to mechanism for shaping the ends or tubes or pipes, the mechanism being characterized by its relative lightness of Weight, compactness orn structure, and accuracy of performance. lt has the added advantage of being composed or' simple parts which are easilyV made, so that the cost oi the complete machine is relatively loiv.

Vhile the machine hereinafter described Which is an embodiment of my invention is capable oi operating on a WideA range or" materials, it is particularly designed toiuse vvith conduit tubes which are constructed oti iibrous material such as interteited cellulosic iibers which may be shaped into tubular form by any desired process and impregnated with a suitable saturant oi asphaltic or equivalent compound. Such tubes may for example be made by pro; gressively depositing a sheet of Wood pulp on the cylinder of a paper machine, then rolling up the Wet sheet of pulp. upon itself under pressure to form a unitary homogeneous structure of interelted libers Which when dried and impregnated With a suitable sat-tirant, results ina product which is light and strong and is admirably adapted ltor use as conduits in many lines oit Worin ln' order to lay rtight conduits ot indenite length, the ends of successive tubes or lengths mustbe secured together with tight joints. One method oit accomplishing this is to taper the ends of the tubes on their' exterior surface and drive them into short couplings which are tapered internally to receive the ends ot the tubes iii a tight lit and are usually of slightly larger 'diameter than the tubes. Cement `may be applied,ifv desired, to the Contact surfaces betore'malri ing the joint. Another method is to taper one end of each tube with shoulder between the uncut exterior surface and the tapered surface, the length ot the tapered portion from the shoulder so the end of the tube tightly fitting joint- With the 'externallyaccurately cut.

Serial No. i36/3'35.

tapered end of another tube.V In this case,

the end of each ot the tubes malring'the joint abuts the shoulder on the other tube, and the surfaces ot the taperedportions Yengage each other evenly if the tapers `have been t is customary to use a suitable cement in a joint of this kind, the resulting conduit having a uniform external as vWell as internal diameter throughout its length, since no couplings are used. v j

According to present practice, the tapers of boththeY types described are vcut at the mill Where the tubes are made or Where vthey are handled in quantity, special niachinery being used to cut the tapers accurately and expeditiously, and the tubes and couplings are shipped ready kto be puttegether. `it lfrequently happens, however, that in the course' of laying va conduit or pipe line, it becomes necessary to cut a length oi" tube, as for example Whena bendV n ust come at a certain place.' t is a'simple matter to saw the tube to the desired length,

'but extremely diiiicult to fashion thecut end j I to ina-lie a goed iitanda tight 4joint Without sending the piece to themill.

To obViate Such dificulties'ln held Work, the machine hereinafter described Ywas devised. lt is f compactly built se as to bestowed with' tools and accessories in; a relatively small chest V,cover-thereof.

Further advantageous features @vill be apparent from the disclosure of the machine in the description and dr Wings,ot which Figure lis a plan View of Vthe machine.

Figure 2 is front endv elevationot the same.,V i

Figure Bis Figure 2.v

Figure l a section on the line 3-3 oi"` is a sectionshowin a ortion of Figure SWith tie parts ina different position.

j Figurel Figure l. j Y j Figure 6 is a sectionon the line 6 6 of Figure 5. l i

whichV is adapted to be used as a benchfor is a section on theline-f ,of

kdivergence from the axial direction.

Figure 7 is a section on the line 7-7 of Figure 1.

Figure 8 shows a portion of Figure 7 with the parts in a different position.

Figure 9 is a section on the line 9-9 of Figure 3.

Figure 10 is a top view of the tool carriage showing its position relative to the work.

Figure 11 shows a special tool for forming an inside taper in the work.

Figure 12 is a section on the line 12-12 of Figure 2.

Figure 13 is an elevation, partly in section, of the chuck-holding mechanism.

Figures 14 and 15 are sections on the lines 14-14 and 15-15 of Figure 13.

Referring to Figures 1 and 2, the machine as a whole is a relatively light and compact structure supported on a suitable standard 20. A tool carriage 21 is adjustably mounted on an arm 22 which is pivotally supported near its center to swing the tool carriage around the work 23 coaxially therewith. rlhe work on which the tool operates is held in fixed position, this arrangement making the apparatus equally useful for operating on the ends of straight lengths, bends, T-joints or other forms of conduit. A feed screw 24 is provided to feed the tool longitudinally of the work.

The driving mechanism comprises a hand crank 25 which is suitably connected to a shaft 26 on which is keyed 'a gear 27 and gear 28 which is keyed to a hub member 29 formed centrally on the arm 22 (Figure 12). The hub member 29 bears on a fixed quill 31 which is supported by the standard 20 and secured against motion by a. set screw 32. The hub member 29 defines two portions of the arm 22, one of Vwhich carries a cutting head while the opposite portion is preferably in the vform of a counterweight 33. The cutting head comprises a block 35 adapted to slide on the arm 22 and to be clamped thereto in adjusted position as by a bolt 36 and nut 38, the bolt 36 having a head 37 fitted to slide in an undercut slot or groove 34 in the arm 22. From the block 35 extends a squared stud or bar 39 on which the tool carriage is adapted to slide in its feeding motion. In order to produce the desired taper in the work, this stud 39 is fixed at an angle to the work equal to the angle of taper desired. As the tool carriage is moved outwardly along the stud 39 during the operation of the cutter, the inclination of the stud relative to the axis of the work will give the tool a motion divergent from the axis. The taper results from this Since for the particular service. the machine illustrated in the drawings is designed, a standard unvarying taper has been adopted and maintained, the stud 39 is fixed at that delinite angle as shown in Figure 1. It will be understood, however, that if there should be a call for tapers of various pitches, the stud 39 can readily be provided with a swivel mount so as to be capable of being adjusted to any desired angle and to produce thereby any desired taper.

rIhe feeding mechanism may be of any suitable variety. As shown it comprises a feed screw 24 journaled in the block 35 and extending through the tool carriage 21 parallel to the stud 39. As shown in Figure 3 a star wheel 4() is fixed on the end of the screw 24 opposite the threaded portion. As the arm 22 revolves around the quill 31 in the operation of the machine, it carries with it the cutting head 35 and the members sup ported thereby, including the tool carriage 21 and the feed screw 24. rlhe star wheel 40 thus describes a circle about the quill 31. In order to rotate the feed screw 24 and thus to advance the tool carriage 21, a rack 41 is provided to be engaged by the star wheel 40 and to rotate the same during the interval in which the teeth of the two are in mesh (Figure 7). The rack 41 is preferably mounted on a suitable plate 42 and may be adjustably secured to a suitable slotted arm 43 formed on the standard 20. As shown in Figure 1, a bolt 44 and wing nut 45 are provided to clamp the plate 42 to the arm 43. Thus whenever the position of the cutting head block 35 is adjusted for work of different sizes, the plate 42 may also be adjusted to position the rack 41 tangentially to the path of the star wheel 40. In order toV enable the operator to remove the rack 41 temporarily from the path of the star wheel 40 without disturbing the adjustment of the supporting plate 42, a rotating bolt 46 is provided having a lug 47 thereon adapted to engage the rear face of the rack 41. The bolt 46 also has a handle 43 by which it may be turned to take the operative position illustrated in Figure 7, or the inoperative position shown in Figure 8. TWhen the lug 47 is swung away from the rear face of the rack 41 as in Figure 8, the rack 41 is swung back on its pivot out of the path of the wheel 40 as by a spring 49 attached to the rack and to the plate 42.

The tool carriage 21 comprises a channeled block 50 adapted to fit closely on 'three sides of the stud 39 to slide thereon. The fourth side of the stud is engaged by the lower portion 51 of a split nut which is secured as by screws 52 within the channel of the block 50. T he upper portion 53 of the split nut is held in position in the channel of the block 50 by a pin 54 passing through a pair of ears 55 formed on the upper portion of the block 50 and engaging in a transverse groove in the upper face of the split nut member 53, permitting a limiting rocking motion of the member 53 about the pin 54. The member .50, edge being designed to out the tapered sur- 1,s1.1,s94 151v This comprises a pair of nuts 66, 67, each nut being provided with a tapered portion 68 and a reduced portion `69, the latter being castellated and adapted to interr'lt `so as lto prevent relativerotation of the nuts. The'. nut Gis also castellated at its' vopposite end to interiit with `complementary Castella-- tions on theend oithe quill al. Since the latter is iixedagainst rotation by the set screw 32, the nuts 66, 6T are likewise izged ge against rotation, but are permitted aflimited longitudinal movement relative to each other and to the quill el. Journaled within the quill il is a spindle 7C' to one end of which is pinned a hand wheel 7l provided with re gg cesses 725.11 its periphery to receive a tool for tight setting up. lOn the opposite end portion of the spindle TO are outright and left hand threads as at 73, 7d en whicl threads vthe nuts 66, .67 respectively are'gi; mounted. Since the nuts are held against rotation in any direction, will be apparent that the rotation of the spindle ZO by the 10WI` few@ 0f the membl 53- Thus by me* hand wheel 7l will cause the nuts .66, pultng the handle 60, the OOl C'loe move simultaneously toward or away from 2l maybe mede te feed er Het as desired, each other, aecordng to the direction orl and by disengaging the feed, the carriage rotation'of spindle. Since the expand.- lly be SllCl Ril 011C@ t0 ll1y-l`l`l POD O11 ing Chuck G5 is Huid@ 0f Such a Engg-h as 15.9 the SUCl 39- i be supported by the inclined 'iacesorD the The tool Carriage is lprovided Y'With tapered portions 63, motion oi the nuts t- F95 QTOOVQL lug .GQO hOCl a Culg; @C0-l 521 ward eachother will cause the chuck 65 to (Figure lo) This i001 S riiafl l POSOD eXpandg since both nuts move by an en the wel e211 ieee and ente etape? by ree` equal'ameunt, no longitudinal displacement, son of the angular mounting oi theV stud 39 of rh@ Chuck will ba @ausg-j ngyeby in 3.5.03 the Cutting head leV-iGl-Sly il@ order to maintain the chuck against rota- RSCIbCl- By peftllg heldll@ t0 CU''O tion duri-ng the operation of the. cutter, a bil() pOlll llCllGCl 'lS 500i SllGXVll S191; inlay be pgvidedthggn "LAO @ng-gg@ 5L .ure l0 and then stopping, a shoulder may be key 735m' @im nut Si Suitable dus@ Sleeves left in the worlr against which the end of 75( be movida@ to @over he ape?- Aafke @Gleelay Place may ab@ lll fof m" tures between the nutsy 66, 67 and between "umg l 30mn n O'd t0 US@ dus machin@ the nut 67 and the end of he quilla-l. rilhese for shaping the female portion oi the joint 5169x763 may be 130s@ 0l fm- QODV@ QCS fw by tale' ill@ inside SU'flC@ 0f h@ WCfk tache'd to the nut 67. In order to exchange il lool COmPlSg a Pai? 0f CUQYS 63 2nd 64, chuclrs forY use with work-oi" different sizes, 45.. llusmed ill Fgu@ 11; may be. mufl it is necessary to remove the nut 66 from the 3*"09 the tool Cmllge the CUS? 63 being spindle 70, hence the nuts 65, 6'? are so posi- {lCllplQ/Cl O tfllll bile Oli bil@ WOll, {ji/ned Qnthe I'Lheded politiong of the Spinthe cutter G4; being provided with cust 5' Uevthafa'when hey .reach @heir position@ edges on both its end and one side, the side maximum SeparationVv by theA manipulation of the hand wheel, 7l, their vjinte engaging ends will just clear each @other so that by removing the retaining bolt 76 and washer 77 from the end of the spindle TO, the nut 6G may beunscrewedtherefromin replacing theY nut *66, it vis screwed upto its normalV position vof maximum separation from ythe, Y nut 67, in which ,position the ycomplementary portions of the two nuts should be aligned. ln order to `provideior. ready alignment, notches 'p78 may be cut in the nuts 65, 67 which will bein line whenever complemen- 53 at its other end `is provided with a pairot upstanding transverse ridges 56 between which a bolt '57 extends, which also passes through a pair of ears 58 formen on the 5 block 50. A portion of the bolt is cut awayY f" for a portion of its length forming a Vrecess as at59 between the ears 58 registering with the split nut member 53 `(Figure 9).V rlhe lower member lof the split nut is not 10 threaded at all, Vthe upper member 53 .being threaded only for a short distance at the vend tl erect which is in Contact with the bolt 57. The bolt is provided with a suitable handle 6l) by which it may be turned to bring the 15Nrecess 59 up as shown in Figure 3,"or down as shown in Figure 4,-. In the 'former case, the threaded portion of the member 53 will be held in engagement with the thread of the screw 24, while in the latter case the 20. threaded portion of themember 53 will be held out of engagement with the thread of the screw 24 as by suitable springs 6l set into member 5l and pressing against the los "'face from the end to form a shoulder. The cutters 53, Se are mounted an angle'to the carriage, the angle being twice that between the stud 39 and the axis oi tie work 55, so as to overcome the effect of the dizfergent motion of the tool carriage and to cut sur-V face tapering oppositely by thesame ,angle on the inner surface of the worlr which will' be complementary to the enes tapered on "30, their exterior surface.

An expanding chuck 65 is provided 'to be inserted in an end of the worlr and by eX- pansion to grin the work securely during the w operation of the cutter. rThe holder for the "aexpanding chuck is shown in Figure 13.

tary ends'Y of the nuts are in line. A bridge gauge 79 may be provided soshaped `that.,

its ends .will fit intpV ,the notches 78 when in line. Withthe gaugein positionvyaslightb` turn of the hand wheel 7l will bring the castellated ends of the nuts into engagement.

In order' to hold the moving parts of the cutting mechanism and driving parts in fixed position, as for example, when adjustments are being made, a suitable pin 8O may be inserted through the standard 2O in a position projecting between successive teeth in the gear 7, thus holding the arm 22 and its associated parts against rotation. The pin 80 is manipulated as by a knurled head 8l which is slotted to receive a limit stop member 82 which prevents the complete removal of the pin from the housing.

The machine as a whole is constructed as lightly as possible consistent with sufficient strength to withstand rough usage. The expanding chuck which grips the work from within insures accurate registration of the interior surfaces of successive tubes when joined together, so that no shoulders appear on the inner wall of the finished conduit. The machine is easy to set up and operate, and cuts the tapers with a high degree of accuracyT so that tight and satisfactory joints can be quickly made. of tubes which are cut on the field without having to resort to the mill or a machine shop.

Having thus described an embodiment of my invention, it should be evident to those skilled in the art that many changes and modifications may be made therein without departing from its spirit or scope as defined by the appending claims.

I claim:

l. A machine for shaping ends of tubes, comprising an expansible chuck adapted to enter the end of a tube, a support for said chuck, means for holding said chuck against rotation relative to said support, means actuable to expand said chuck without longitudinal displacement, a tool carriage, means actuable to revolve the carriage about the work, and means for feeding the carriage along the work.

2. A machine for shaping ends of tubes, which comprises an expanding chuck adapted to enter an end of the work, means actuable to expand the chuck without longitudi nal displacement thereof or change of axis, a tool carriage, mechanism actuable to revolve the carriage about the work, said mechanism comprising a crank arm having a hub portion disposed coaxially with said chuck, a stud mounted on said arm for adjustment longitudinally thereof, said stud having a predetermined angular relation to the plane of revolution of the carriage and being adapted to slidably support said carriage, a feed screw disposed parallel to said stud and engageable by said carriage, and means for rotating said feed screw as the carriage is revolved about the work.

3. A machine for shaping the ends of tubes, which comprises a standard having a horizontal bore, a cylindrical quill fixed within said bore and projecting therefrom, a shaft extending through said quill and rotatable therein, an expanding chuck extending coaxially from the projecting portion of said quill and interlocked therewith against relative rotation, said chuck being operatively connected to said shaft for expansion and contraction by rotation thereof, a hand wheel on said shaft, a hub member loosely mounted on the projecting portion of said quill, a crank arm fixed on said hub and extending radially therefrom, a stud adjustably mounted on said arm at a predetermined angle to the plane of rotation of said arm, a tool carriage slidably mounted on said stud, means for intermittently feeding said carriage along said stud during the operation of the machine, a gear keyed on said quill, and a driving gear meshing with said keyed gear.

4. A machine of the class described comprising means engaging with the work to hold it against rotation, a tool carriage, means actuable to revolve said carriage about the work, and means for feeding said carriage along the work, said feeding means including a feed screw, an element carried by said carriage normally in threaded engagement with said feed screw, and a member rockable to move said element into and out of threaded engagement with said screw.

In testimony whereof I have aflixed my signature.

IIOIVARD PARKER. 

